When Bobby reached Mr. Barlow's shop, as soon as he could get his breath, he said, "Oh, Mr. Barlow, have you a big window pane? I've broken our Big South Window."

"Broken your Big South Window, have you? Well, that is too bad. I think I haven't one now, and to-morrow is Sunday; but I'll get you one on Monday when I go to the city."

"Oh, but it must be put in to-day," said Bobby. "I have the money to pay you. Would four dollars be enough?"

"I think that would be enough," said Mr. Barlow. "But I will have to nail boards over it to-night and get a big pane Monday."

"But I do so want it put in to-day," said Bobby. "Mother is coming home on the four o'clock train."

"So your mother's coming home, is she?" He saw the anxious look on Bobby's face.

"I will see what I can find," he said.

Mr. Barlow's shop was piled full of all sorts of things for building houses. Besides his work bench and tool chests, there were piles of lumber, bundles of shingles, odd window sashes and, in one corner, some window panes. He went to this corner and looked over the panes.

"No," he said, "there is nothing big enough."

Bobby began to look here and there. Back of a pile of lumber, he found two window panes.